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Commit 7d1aa149 authored by Paul Walmsley's avatar Paul Walmsley Committed by Tony Lindgren
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omap2 clock: use the struct clk round_rate field for clksel rate rounding code 

The OMAP clock framework struct clk contains a field, .round_rate,
that is intended to contain a function pointer to rate rounding code.
Take advantage of it by converting all clksel clocks' round_rate field
to point to omap2_clksel_round_rate().  Rename the existing
omap2_clksel_round_rate() to omap2_clksel_round_rate_div(), to signify
that it returns divisor information as well, and set up
omap2_clksel_round_rate() as a wrapper for the clock framework to use.
Simplify omap2_clk_round_rate() accordingly.
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 44761901
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Showing with 51 additions and 12 deletions
arch/arm/mach-omap2/clock.c
View file @ 7d1aa149
......@@ -472,7 +472,7 @@ const static struct clksel *omap2_get_clksel_by_parent(struct clk *clk,
}
/**
* omap2_clksel_round_rate - find divisor for the given clock and target rate.
* omap2_clksel_round_rate_div - find divisor for the given clock and rate
* @clk: OMAP struct clk to use
* @target_rate: desired clock rate
* @new_div: ptr to where we should store the divisor
......@@ -484,15 +484,16 @@ const static struct clksel *omap2_get_clksel_by_parent(struct clk *clk,
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
static u32 omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate,
u32 *new_div)
static u32 omap2_clksel_round_rate_div(struct clk *clk,
unsigned long target_rate,
u32 *new_div)
{
unsigned long test_rate;
const struct clksel *clks;
const struct clksel_rate *clkr;
u32 last_div = 0;
printk(KERN_INFO "clock: clksel_round_rate for %s target_rate %ld\n",
printk(KERN_INFO "clock: clksel_round_rate_div: %s target_rate %ld\n",
clk->name, target_rate);
*new_div = 1;
......@@ -533,20 +534,37 @@ static u32 omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate,
return (clk->parent->rate / clkr->div);
}
/* Given a clock and a rate apply a clock specific rounding function */
static long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
/**
* omap2_clksel_round_rate - find rounded rate for the given clock and rate
* @clk: OMAP struct clk to use
* @target_rate: desired clock rate
*
* Compatibility wrapper for OMAP clock framework
* Finds best target rate based on the source clock and possible dividers.
* rates. The divider array must be sorted with smallest divider first.
* Note that this will not work for clocks which are part of CONFIG_PARTICIPANT,
* they are only settable as part of virtual_prcm set.
*
* Returns the rounded clock rate or returns 0xffffffff on error.
*/
static long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate)
{
u32 new_div = 0;
u32 new_div;
if (clk->flags & RATE_FIXED)
return clk->rate;
return omap2_clksel_round_rate_div(clk, target_rate, &new_div);
}
if (clk->flags & RATE_CKCTL)
return omap2_clksel_round_rate(clk, rate, &new_div);
/* Given a clock and a rate apply a clock specific rounding function */
static long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
{
if (clk->round_rate != 0)
return clk->round_rate(clk, rate);
if (clk->flags & RATE_FIXED)
printk(KERN_ERR "clock: generic omap2_clk_round_rate called "
"on fixed-rate clock %s\n", clk->name);
return clk->rate;
}
......@@ -781,7 +799,7 @@ static int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
if (clk == &dpll_ck)
return omap2_reprogram_dpll(clk, rate);
validrate = omap2_clksel_round_rate(clk, rate, &new_div);
validrate = omap2_clksel_round_rate_div(clk, rate, &new_div);
if (validrate != rate)
return ret;
......
arch/arm/mach-omap2/clock.h
View file @ 7d1aa149
......@@ -39,6 +39,8 @@ static u32 omap2_clksel_to_divisor(struct clk *clk, u32 field_val);
static u32 omap2_divisor_to_clksel(struct clk *clk, u32 div);
static void omap2_dpll_recalc(struct clk *clk);
static void omap2_fixed_divisor_recalc(struct clk *clk);
static long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
/* Key dividers which make up a PRCM set. Ratio's for a PRCM are mandated.
* xtal_speed, dpll_speed, mpu_speed, CM_CLKSEL_MPU,CM_CLKSEL_DSP
......@@ -736,6 +738,7 @@ static struct clk func_96m_ck = {
.clksel_mask = OMAP2430_96M_SOURCE,
.clksel = func_96m_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/* func_48m_ck */
......@@ -767,6 +770,7 @@ static struct clk func_48m_ck = {
.clksel_mask = OMAP24XX_48M_SOURCE,
.clksel = func_48m_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk func_12m_ck = {
......@@ -861,6 +865,7 @@ static struct clk sys_clkout = {
.clksel_mask = OMAP24XX_CLKOUT_DIV_MASK,
.clksel = sys_clkout_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/* In 2430, new in 2420 ES2 */
......@@ -940,6 +945,7 @@ static struct clk mpu_ck = { /* Control cpu */
.clksel_mask = OMAP24XX_CLKSEL_MPU_MASK,
.clksel = mpu_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/*
......@@ -981,6 +987,7 @@ static struct clk iva2_1_fck = {
.clksel_mask = OMAP24XX_CLKSEL_DSP_MASK,
.clksel = iva2_1_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/* iva2_1_ick */
......@@ -1005,6 +1012,8 @@ static struct clk iva2_1_ick = {
.clksel_mask = OMAP24XX_CLKSEL_DSP_IF_MASK,
.clksel = iva2_1_ick_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/*
......@@ -1040,6 +1049,7 @@ static struct clk dsp_fck = {
.clksel_mask = OMAP24XX_CLKSEL_DSP_MASK,
.clksel = dsp_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static const struct clksel_rate dsp_ick_core_rates[] = {
......@@ -1094,6 +1104,7 @@ static struct clk iva1_ifck = {
.clksel_mask = OMAP2420_CLKSEL_IVA_MASK,
.clksel = iva1_ifck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/* IVA1 mpu/int/i/f clocks are /2 of parent */
......@@ -1153,6 +1164,7 @@ static struct clk core_l3_ck = { /* Used for ick and fck, interconnect */
.clksel_mask = OMAP24XX_CLKSEL_L3_MASK,
.clksel = core_l3_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/* usb_l4_ick */
......@@ -1180,6 +1192,7 @@ static struct clk usb_l4_ick = { /* FS-USB interface clock */
.clksel_mask = OMAP24XX_CLKSEL_USB_MASK,
.clksel = usb_l4_ick_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/*
......@@ -1217,6 +1230,7 @@ static struct clk ssi_ssr_sst_fck = {
.clksel_mask = OMAP24XX_CLKSEL_SSI_MASK,
.clksel = ssi_ssr_sst_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
/*
......@@ -1260,6 +1274,7 @@ static struct clk gfx_3d_fck = {
.clksel_mask = OMAP_CLKSEL_GFX_MASK,
.clksel = gfx_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk gfx_2d_fck = {
......@@ -1273,6 +1288,7 @@ static struct clk gfx_2d_fck = {
.clksel_mask = OMAP_CLKSEL_GFX_MASK,
.clksel = gfx_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk gfx_ick = {
......@@ -1315,6 +1331,7 @@ static struct clk mdm_ick = { /* used both as a ick and fck */
.clksel_mask = OMAP2430_CLKSEL_MDM_MASK,
.clksel = mdm_ick_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk mdm_osc_ck = {
......@@ -1354,6 +1371,7 @@ static struct clk l4_ck = { /* used both as an ick and fck */
.clksel_mask = OMAP24XX_CLKSEL_L4_MASK,
.clksel = l4_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk ssi_l4_ick = {
......@@ -1421,6 +1439,7 @@ static struct clk dss1_fck = {
.clksel_mask = OMAP24XX_CLKSEL_DSS1_MASK,
.clksel = dss1_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static const struct clksel_rate dss2_fck_sys_rates[] = {
......@@ -1511,6 +1530,7 @@ static struct clk gpt1_fck = {
.clksel_mask = OMAP24XX_CLKSEL_GPT1_MASK,
.clksel = gpt_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk gpt2_ick = {
......@@ -2297,6 +2317,7 @@ static struct clk vlynq_fck = {
.clksel_mask = OMAP2420_CLKSEL_VLYNQ_MASK,
.clksel = vlynq_fck_clksel,
.recalc = &omap2_clksel_recalc,
.round_rate = &omap2_clksel_round_rate
};
static struct clk sdrc_ick = {
......
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